Brake application valve device



June 16, 1931.` l 1 -H, woons 1,810,547

mmm APPLICATION VALVE-.DEVICE .Filed Aprii fr. 195o 2 shuts-sneu .1

INVENTOR uol-4N H wp ons ATTORNEY alune 16, 1931. lf H, woQDs l 1,810,547

BRAKE APPLICATION VALVE DEVICE Filled Apr'l 7. 1930 2 Sheets-,Sheet 2 INVENTOR JOHN .H.WOODS s Patented June 16, 1931 PATENT lOl-#Flcli JOHN H. WOODS, OI` HAMILTON, ONTARIO, CANADA, AssIGNoRTo THE'WES'TINGHOUSE `AIR BRAKE COMPANY, OF WILMEIz-DING, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA BRAKE APPLICATION V'AILVIZ.y DEVKICE` Y Application filed April 7, 1930. Serial No. 442,043.

yThis invention relates to tfluid pressure brakes, and more particularly to a brake apl plicati-on valve device of the type which is adapted to be carried by a caboose or other '5' rear car'of a train, and through the medium of which, a trainman stationed'on the rear car,`m`ay cause an application of the brakes to be effected at will. s j

By `the use of such avalve device a trainman could, regardless of service requirements and to suithis Own convenience, decrease the speed of .the train without bringing the train to a stop. "y Such practice is very objectionable since it interferes with the proper control of 15 the train, and therefore renders the operation of the train dangerous. 1 1 The principal object of nay-invention is to provide anv application valve device'which f when applied to the rear carof a train, and

operated torapplication position, must vbe operated to fullapplication, lor* emergency position before' it ,can be returnedto lap or closedl position, thus limiting the use of the valve device to occasions when it is necessary tobring the train to a stop, 'and also imposing the penaltyof stopping the train in the eventof a trainman attemptingto decrease the speed of the train to suit his own convenience. A3() Another Object of my invention is to provide an application'valve device which when operatedfrom its closed or lap position ,tov an n f initial open or application position, cannot be returned to lap position until the device is first operatedto full open or final applicationposition. x M

A furtherobject ofmy invention is to provide a brake application valve device having a lap or closed position and an application or open zone,andhav1ngvmeans Operatlve when the'device isioperated from lap position to the beginning of the application zone forpreventing the operation of the valve device to lapposition `and operative when the device is operatedgto the end of the applicati-on zonek forfpermittingfthe device to be operated to lap or closed position. Y y v' n Otherobjects and advantages will appear ,50. inthe following more detailed description vof the invention.

-In the accompanyingdrawings; Fig. l is a front elevational view of a brake application valve device embodying my invention, the loperating handle ofthe device being shown in lap or closed position; Fig. 2 is a vertical-sectional view of the same taken on the line 2 2 of Fig. l.; Fig. 3 is a sectional view taken on the line 3 3 of Fig. 2 and illustrates the relative positions of the discharge ports in the rotary valve and rotary valve seat when the rotary valve is in lap or closed position; Fig. 4 is a sectional view taken on the line 4 4 of Fig. 2 vand shows the locking mechanism in its unlocked position withy the device in lap or closed position;

.Figs 5, 6 and 7 are sectional views similar to application zone; Fig. 8 is an enlarged'fragmentary side elevational view of a portion of the locking mechanism as viewed in the direction indicated by the arrows 8 8 in Fig. 6; Figs. 9 and lOvare enlarged detail Aside elevational and bottom plan views, 'respectively of the locking latch;andF,ig. l1 is a diagram'- matic view of one formof brake equipment embodying the invention. l' In'Fig. ll of the accompanying drawings, the fluid pressure? brake equipment of the rearcar only of the train has been illustrated, and this equipment may comprise the usual train Vpipe l, triple valvedevice2, auxiliary reservoir 3, andbra'ke cylinder 4, all of which parts and devices are associated with each other in the usual well known manner. This equipment mayl also comprise'my improved brake application valve device 5, which is connected tothe brakepipe l through a pipe 6, or any othersuitable Huid pressure conductor.A Y, j

.,The fluid pressure brakeequipment for all of the other carsv ofthe train may be the same as that for-therear car with the exception ythat the brake application valve device 5 may beomitted.' .n

' with an angle cock 7 having theusualhose 8 connected thereto for couplingwith alike hose onk the adjacent end ofan adjacent car, Y

When a trainis made up, the coupling hose between the adjacent ends of adjacent cars are coupled in the usual manner, the angle cocks 7 at the front and rear of the train are closed andall of the other angle cocks are open, so that in effect, the brake pipe is continuous from one end of the train to the other. Y

My improved brake application valve device 5 may comprise a casing having sections 9, 10 and 11 which-'are secured together by stud bolts 12.

The casing section 9 has a chamber 13 which is constantly connected to the brake pipe 1V through pipe 6, and contains a rotary valve 14 which is adapted to be'rotated through the medium of a rotatable stem 15, which is journalled in the casing-sections 10 and 11. The outer end portion of the stem 15 extends through the casing section 11, and has secured thereto'an operating handle 16'by which the stem maybe rotated.

The rotary valve 14 has ports 17, 18, 19 and 2O formed therein, which are so arranged in an arc of a circle'that when therrotary valve is rotated they will be successively opened to an arcuate port 21 formedin the section 1() of the casing, Whichport 21 leads from the rotary valve seat to a chamber v22 formed in he casing section 10, said chamber being constantly connected to the atmosphere through a pipe 23.

The smallest port in the rotary valve is the port 17 and the diameters of the other ports are progressively increasedv so that the port 20 is the largest.

The casing section 11 is provided with a quadrant 24, having spaced stops 25 and 26, againstwhich the usual spring-pressed pin 27, carried by the operating handle, is adapt'- ed to abut to stop the handle in lap and full application positions, respectively. Intermediate these stops, and correspondingly spaced with the ports 17 ,18 and 19in the rotary valve, the quadrant has formed therein, notches 28, 29 and 30 for the reception of the roundedouter end of the pin 27. As the handle 16 is operated,'the pin 27, engaging the quadrant within the notches, offers a slight resistance to the operation of the handle, thus indicating to the operator the position of the vrotary valve. Y

Contained in a recess 31, formed in the casing section 10, and removably secured to the Vstem 15, is a collar 32, having a notch 33, formed therein, and having radial projections 34 and 35, which are arranged in staggered relation and which, in the present embodiment of the invent-ion, are in theform of pins rigidly secured tothe collar.

Also contained in the recess 31 is a latch 36 which, intermediate its ends is pivotally connected to the casing section 10 by a pin 37. One end of thislatch 26 is pivotally connected with a member' 38 which is subjectto the pressure ofv a spring 39 interposed between and engaging the casing and a collar 40 carried by the member 38. The free end of the latch is made in the form of a tooth 41, which is adapted to engage the collar 32 within the notch 33.

The underside of the latch is out away at 42 fora portion of its thickness so that the projection 34, carried by the collar 32 will Vnot interfere with the operation of the latch.

The end portion of the latch which is operatively connected with the member 38, is provided with a shoulder 43, which is disposed in the path. of travel of the projection 35, carried by the collar 32, and is adapted to be operatively engaged by said projection as the valve device nears its full applicationor open position for the purpose of raising the latch, as willibe hereinafter more fully described.

F or the lpurpose of operatively connectingl the collar 32 to the stem 15, a T-shaped pin is provided, having ay shank 44, which lits in an opening vformed in the`co1lar nearer its front edge than its rear edge, and having a head 45, `which fits in a groove 46, formed in the stem 15. This groove ext-ends longitudinally from the outer end of the stem to a point iadjacent the inner edge ofthe collar 32. In assembling the mechanism, the collar-'32'isy mountedon the stem 15, and pushed intoiplace before'the casing section 11 is placed into position. After the casing section is'in position, excessive movement of the collar longitudinally of the stem will be prevented by the sections 10 and 11.

Y Sin'cethe T-shaped pin'islocated nearer the front edge of the collar 32, the head 45 of the pin will project slightly beyond this ledge of the' collar and if, in assembling the device, thecollar should b'e-accidentally reversed, thisprojecting portion of the head 45 willfengag'e the stem at the inner end'of the groove 46 and prevent the proper assembly ofthe collar 32 on the stem, and consequently, prevent the proper assembly of the casing section l11,relative to the casing section 10. Vhen a workman assembling the valve device linds that he cannot move the collar to its proper position, he will know that the collar must be reversed, thus insuring lthe proper positioning of the collar.

Assuming that the application valve device is in lap or closed position, Las shown in Figsl, 2, 3, and 4, the operating handle 16 will be held against movement in-an anticlockwise directionby reason of the'engagement of the stop 25, by the spring-pressed pin 27,'the rotary valvezwill be in such la position that the ports 17, 18, 19 and 20 therethrough will all be lapped, fthe collar 32 will be in such a position that" the notch'33 will be back of the tooth 41 oflthe latch 36, and thelatch tooth 41 will be forced into contact with the outer surface ofthe collar` by the ypressure exerted on the opposite end of the latch by the spring 39.

Itwill here be noted that a center line drawn longitudinally through the member 38, and the centerof its connection with the' latch will pass above the aXis of the pin 37, so 'that the pressure of the spring will tend to rotate the latch in a clockwise direction.

I When it is desired to operate the application valve device to eiiectan application of the brakes, the operator moves the operating handle 16 in a clockwise direction from its lap position as shown in Figs. 1,2, 3 and 4, to any desired `application position Within the application zone, and consequently causes the rotaton of the stem 15, collar 32 and rotary valve 14.

TvVhen the operating handle 16 has been moved to the beginning of the application zone, in which the pin 27 engages the quadrant 24 Within the notch 28, the port 17 in the rotary valve 14 is open to the port 21 in the casing section 10, and fluid under pressure will be discharged from the brake'pipe 1 to the atmosphere at a restricted rate by Way ot pipe 6, chamber 13 in the casing section 9 of the application valve device 5, port 17 in the rotary valve 14, port 21 and chamber Y 22 in the casing section 10, and pipe 23, and

an applicationV of the brakes will result.

At substantially the saine time, or slightly before the port'17 is open to the port 21, the notch 33 will be in line with the tooth l41 of the latch, and the pressure of the spring 39 will cause the latch to rotate in a clockwise direction, forcing the tooth 41 into said under side of the latch to permit the latch to move into the-notch. The operator may now permit the operating` handle to remain in thisposition until the train is stopped, or may move it to any of the other ap-plication positions to hasten the 'application of the brakes. l

Vhen the tooth 41 is in engagement with the collar 32 within the notch 33, the operator cannot ,move the handle from the first application position to lap position, but he can move the handle to any of the other application positions. vl/Vhen the handle is moved from t-he first application position toward the second application position, the tooth 41 will ride freely out of the notch 33.

Should the operator move the operating handle to the second or third application position, and then attempt to return the operating handle to lap position, the latch 41V will be moved into locking engagement with the collar 32, when the notch 33 is again in registration with rthe latch tooth- 41, thus locking the valve device in its first application position. f

Before the application valve device' can be returned to lap position, it must be operated to full application position, andthis operation will now be described. i l

' As thehandle is moved from its third application. position toward its i'ull application position, t-he projection 35, carried by the collar 32,-,engages the shoulder 43 o the latch 36, as shown in Fig. 5, and by the continued movement ofthe handle in this direction the projection 35 causes thelatch 36 to rotate about the pin-37 in an anti-clockwise direction. As the latch 36 thus rotates, the latch too h 41 moves upwardly out of engagement with outer surface of the collar 32, while the other-end of the latch moves downwardly.

The spring 39 resists such movement until such time as the center line or" the member 38 and the pivotal connection between the member and latch is in alignment with the center of the pivotal connection between the latch and the casing section 10. New, just before or at substantially the same tinieas the handle is moved to its full application position at the end of the application zone, the member 38 will have been moved to such a position that the center line therethrough will be below the center of the pivot pin 37, so that the pressure exerted by the spring 39 will cause the latch to rotate tothe position shown in F ig. 6, and. will maintain the latch in this position so longas the handle is in an application position.

.lvVhen the valve device is in full application position, all oit the ports through the rotary valve are open to the port 21, so that a reduction inbrake pipe pressure'at a fast rate iseflected, which reduction, would cause'the fluid pressure brake equipment shown in Fig. 11 to operate to effect an emergency application of the brakes. f

Since the latch 36 is held in such a position that the latch tooth 41 cannot engage the collar 32, the operating handle may be re turned to lap position. f

ln returning thehandle toward lap position, the projection 34 will, as shown in Fig. 7 be moved intoengagement with the under side of theend portion of theflatch, which is operatively Vconnected to the member 38, at substantially the saine time as the pin 27 is in engagement with the quadrant 24 within the notch 28. Now, as the movement of the handle 16 toward lap position is continued, the projection 34 causes the latch 36 to rotate in a clockwise direction against the pressure of the spring 39. At substantially the same vtime as the pin 27 of the handle rides out of the notch 28, and the port 17 in the rotary valve is closed, the latch will have been rotated to such a position that the pressure of the spring 39 will causel the latch to move into engagement with theouter surface of the collar 32, the notch 33 having been moved out; oi alignment :with the latchrtooth 41. The handle may now 'be moved to its final lap position, as'shown in Fig. 1.

From the foregoing description it Will be seen that it' an application of the brakes is initiated by the use of my improved application valve device, the train Will be brought to a stop before the device can be returned to lap position, thus limiting the use of the device to occasions When it is necessary to bring the train to a stop, or imposing the penalty of stopping the train in the event of a trainman attempting to decrease the speed of the train Without bringing it to a stop.

lhile one illustrative embodiment of the invention has been described in detail, it is not my intention to limit its scope to that embodiment or otherwise than by the terms of the appended claims. i

Having now described my invention, What l claim as new and desire to secure by Letters Patent, is

l. The combination with a iluid pressure brake application valve device having a lap position and an application Zone, ot means operative automatically upon the operation of said device 'trom lap position to the beginning of said Zone for locking said device against operation from the beginning ot said zone to lap position.

2. The combination with a fluid-pressure brake application valve device having a lap position and an application zone, of means operative automatically upon the operation ot' said device trom lap position to the beginningy of said zone 'for locking said device Y against operation from the beginning of said none to lap position and operative automatically for unlocking said device when the device is operated. to the end of said Zone.

3. The combination with a fluid pressure brake application valve device having a lap position, a full application position and an intermediate application position, of means operative automatically upon the operation ot said device from said lap position to said intermediate position for locking said device againsty return from said intermediate application position to lap position.

il, The combination vvith a fluid pressure brake application valve device having a lap position. a full application position and an intermediate application position, of means operative automatically upon the operation of said device from said .lap position to said intermediate position for locking said device against return trom said intermediate application position to lap position and operative auton'iatically for unlocking said device when the device is operated to full application position.

5. In an application valve device for liuid pressure brakes, the combination with a casing having a fluid pressure inlet chamber and a fluid pressure outlet chamber, a valve normally closing communicationfrom the inlet chamber to the outlet chamber and operative over a predetermined vzone for opening communication from the inlet chamber to the outlet chamber, and means operative when said valve is moved to the beginning of said Zone for locking said valve against its return to lap position from any position in said zone short of the end of the zone.

6. In an application valve device for fluid pressure brakes, the combination with a casing having a fluid pressure inlet chamber and a fluid pressure outlet chamber, a valve normally closing communication from the inlet chamber to the outlet chamber and operative over a predetermined zone for opening communication from the inlet chamber to the outlet chamber, and means operative when said valve is moved to the beginning of said zone for locking said valve against its return to lap position from any position in said Zone short of the end of the Zone, said means being rendered inellective to lock said valve against its return to lap position ivhen the valve is moved tothe end of said zone.

7. in an application valve device for fluid pressure brakes, the combination with a casing having a fluid pressure inlet chamber and a fluid pressure outlet chamber, a valve normally closing communication from the inlet chamber to the outlet chamber and operative over a predetermined zone for opening coinmunication from the inlet-chamberto the outlet chamber, and means operative when said valve is moved to the beginning of said zone for locking said valve against its return to lap position from any position in said Zone short of the end of the zone, said means being rendered inedective to lock said valve against its return to lap position When the valve is moved to the end of said Zone and being again rendered effective to lock said valve as the valve is returned to lap position.

8. In an applicationV valve device for fluid pressure brakes, the combination with a casing having a fluid pressure inlet chamber, a valve normally closing communication from the inlet chamber to the. outlet chamber and operative over a predetermined Zone for opening communication from the inlet chamber to the outlet chamber, a. stem for operating said valve, a collar on said stem, and a latch pivotally mounted on said casing movable into locking engagement with said collar when the valve is moved to the beginning of said zone to prevent the return of the valve to lap position and movable to a position Where it is ineffective to engage said collar When the valve is moved ,to the end of said zone to permit the return of the. valve to lap position.

9. In an application valve device for fluid pressure brakes, the combination With a casing having a fluid pressure inletchamber and a fluid pressure outlet chamber, a valve normally closing communication from the inlet chamber to the outlet chamber and operative over a predetermined Zone for openingv comigsiogslie munication from the inlet chamber to the outlet chamber, a stem for 'operating said valve, a collar on said-stem, and a latch pivotally mounted on said casing movable into locking engagement With said collar When the valve is moved. tothe beginning of said zone to prevent the return of the valve to lap position and movable to a position Where it is ineffective to engage said collar When the valve is moved to the end oit' said zone to permit the return of the valve to lap position and again movable, When the valve is being returned from the end of said Zone toward lap position, to the position to lock With said collar.V

10. In an application valve device for liuid pressure brakes, the combination with a cas- "ing having a fluid pressure inlet chamber and a fluid pressure outlet chamber, a valve normally closing communication from the inlet chamber to the outlet chamber and operative over a predetermined zone for opening com niunication from the inlet chamber to the outlet chamber, a stem for operating said valve, a collar on said stem, a latch pivotallv mounted on said casing movable into locking engagement with said collar when the valve is movedto the beginning of said zone to prevent thereturn of the valve to lap position and movable to a position Where it is ineffective to engage said collar when the valve is moved to the end of said zone to permit the return of the valve to lap position, and means carried bv said collar for controlling theoperation of said latch.

11. In an application valve device for fluid pressure brakes, the combination with a casing having a fluid pressure inlet chamber and a fluid pressure outlet chamber, a valve normally closing communication from the inlet chamber to the outlet chamber and operative over a predetermined zone for opening communication from the inlet chamber to the outlet chamber, a stemfor operating said valve, a collar on said stem, a latch pivotallv mounted on said casing movable into'locking engagement with said collar when the valve is moved to the beginning of said zone to prevent the return of the valve to lap posit-ion andvmovable to a position Where it is ineffective to engage said collar when the valve is moved to the end of said zone to permit the return of the valve to lap position, and a pluralitlv of `proiections on said collar adapted toengage said latch to control its operation.

l2. In an application valve device for iiuid pressure brakesthe combination with a casing having a iluid pressure inlet chamber and a fluid pressure outlet chamber.V a valve normallv closing communication from the vinlet chamber to the outlet chamber and operative overa predetermined zone for opening communi cation from the inlet chamber to the outlet chamber, a stem for operating said valve, a collar on Vsaid stem, a latch pivotallv mounted cn said casing movable into locking enivitli said'collar When the valve is move'clfto the "beginning, of said zone to preventf'the 'returnt of the valve to lap position and movable `to a position Where it is ineffec- 1 aton'e time for urging said latch toward said collarr and operative at another time for urging saidla'chfaivayfromfsaid collar.' y

il 13'. vInan'application valvedevice for fluid pressure brakes, the combination With a casing having a'fluid pressurel inlet chamber and a liuid pressure outlet chamber,a valve normally closing communication from the inlet tothe outlet chamber and operative over a predetermined Zone for `opening;v communication from the inlet chambertothe outlet chamber, a stem for'` operatin,0r said valve, a collar on said stem, a latch pivotally lmounted; on jsaid'casing' movable into locking engagementHWit-hjsaid collar when lthe valve is moved tothe beginning oli said Zone to prevent the kreturn of the valveto lap 'position andmovable toa position Where it is ineiective'to'engagesaid collar Whenfthe ,valve is moved to the end'ot` said zone to permit the return ofthe valve to lap position, means carried bvrsaid collar 'for controlling the op-v eration said latch, and Vmeans for securing said collar' to said stem, said means being adapted to prevent the correct positioning of the collar on the stem When said collar is incorrectly placed on the stem` 1 4. In an application valve device for fluid pressure brakes, the combination With a. casing having a lluidpressure inlet chamber and a fluid pressure outlet chamber, a valve nor mally closing-communication from the inlet chamber to the outlet chamber and operative over a predetermined Zone for opening com p munication from the inlet chambei` to the outlet chamber, a stem for operating said engagement With said collar'vvhen the valve is Ymoved tothe beginningof said zone t o prevent thereturn of the valve to lap position andmovable to a position where it is ineffective to Aengage said collar when the valve is moved to the end oi said zone to permit the return of the valve to lap position,

meanscarried by saidcollar for controlling the operation of said latch.. and a pin for removably` securing said collar to said stem,

said pin having a head adapted to engage lsaid stem toV prevent thc correct positioning of the collar when the collar is incorrectly placed on the stem. y f

A l5. In a liuid pressure brake apparatus,

the combination with a brake pipe, of a brake application valve device for controlling the venting of fluid under pressure 'lroin said brake pipeto eiif'ect applications of the brake, v

saidv brake application valve devicecomprising a valve hav-ing a lap, position for preventing the venting of fluid under pressure from the brake pipe and operative over an applica-y tion zoneffor venting'fluid under pressure from the brake pipe, A,andv means operative automatically for locking ksaid' valve against itsreturn toflap, position from any position i-n the applieationzone yshort of; the end of said Zone. v

16. In a fluid pressure brake apparatus, the combination With'a brake pipe, of a brake application valve device for controlling'the venting of fluid under pressure from said brakepipe to effect applications of the brake, said brake application valve device compris-A ing a valve havirfifg a lap; position for preventing the venting of Huid under` pressure from the brake pipe and operative over an application Zone for Venting fluid under pressure froni the brake pipe, and means operativ automatically when said valve is moved from lap position to the beginning of the application zone for locking 'said valve against its return tov lap position, said means being rendered ineffective to, locksaid valve against its return to lap position when said valvel is moved to the eIfld of the application c zone Intestmony whereof I have hereunto setv my hand', this 3l Clay Qf March, 1.930.

JOHN WQODS. 

